I know it is a cool and creative way to combine the PIC Programming with the GPS LCD display (You should try it if you have unused GPS LCD display, so it can cut down the cost).This project is based on a PIC16F84.

First of all, you must use a 4 Bit configuration for the LCD to PIC wiring (You’re better use the PIC16F84 wisely, as it doesn’t have too much of port pins).

With the help of above schematic, you can see the:

GPS data coming in on Port A Pin 1

LCD data goes out on Port B Pin 0-3

LCD’s Register Select (Rs) is on Port A Pin 2

LCD’s Enable (E) is on Port A Pin 3

Beside that, you also noticed that I have had eliminated the MAX232 level converter for this project, by only adding a simple software conversion on it. This will save me more space and the entire circuit can fit perfectly on a board the same size as the 4×20 LCD!

As you can see at the above figure, they’ve fitted the PIC and LCD lines breadboarded it neatly behinds the 4×20 LCD!